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Overflow Action Alert

The MWRD has issued an Overflow Action Day alert. Please limit water usage to absolute necessities. Visit our Overflow Action page for more information.

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Metropolitan Water Reclamation District of Greater Chicago

April 14, 2026

Reduce your use of water before, during and after rainstorms to reduce the amount of water in your municipal sewers.

April 14, 2026

Board meetings are open to the public and can be streamed online.

April 13, 2026

The presentations featured updates on the MWRD’s McCook Reservoir, part of the MWRD’s Tunnel and Reservoir Plan, which increases flood protection to everyone in Lyons Township that is served by a combined sewer system.

April 13, 2026

In addition to its important navigation mission, the Chicago Harbor Lock also serves as a significant flood reduction measure for the city of Chicago.

April 10, 2026

Our findings show how hydrometeorological, land surface, and subsurface conditions jointly control network dynamics, offering a foundation for building urban watershed resilience.

April 10, 2026

The threat has been building for years. Over the past century in Chicago, the likelihood of heavy rainstorms has increased sevenfold. These storms can drop more than 8.5 inches of rain in 24 hours.